CVE-2025-3227

Unauthorized channel member management through playbook runs

State: Published
Severity: 4.3 Medium
Published: Jun 20, 2025
Updated: Jun 23, 2025
Reserved: Apr 3, 2025

Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions in playbook runs, allowing authenticated users without the 'Manage Channel Members' permission to add or remove users from public and private channels by manipulating playbook run participants when the run is linked to a channel.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	Mattermost

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
MattermostMattermost	10.5.0 through 10.5.5Affected 9.11.0 through 9.11.15Affected 10.8.0Affected 10.7.0 through 10.7.2Affected 10.6.0 through 10.6.5Affected 10.9.0Not affected 10.5.6Not affected 9.11.16Not affected 10.8.1Not affected 10.7.3Not affected 10.6.6Not affected

References

https://mattermost.com/security-updates

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